/Engine/Plugins/Editor/ObjectMixer/ObjectMixer/Source/ObjectMixer/Public/Views/List/RowTypes/ObjectMixerEditorListRowUObject.h
Get the ID that represents this tree item. Used to reference this item in a map
virtual [FSceneOutlinerTreeItemID](API\Editor\SceneOutliner\FSceneOutlinerTreeItemID) GetID() const